Method and device for vehicle battery protection with battery power source noise pattern analysis

• US 7,525,286 B2
• Filed: 12/28/2005
• Issued: 04/28/2009
• Est. Priority Date: 12/31/2004
• Status: Expired due to Fees

• Current Assignee: Jeen-Shuh Wang
• Original Assignee: Jason El Technology Company Limited
• Inventors: Wang, Jeen-Shuh
• Primary Examiner(s): Ullah; Akm E
• Assistant Examiner(s): Berhanu; Samuel
• Application Number:
  US11/318,621
• Publication Number:
  US 20070145950A1
• Time in Patent Office: 1,217 Days
• Field of Search: 320/104, 320/105, 320/133
• US Class Current: 320/133
• CPC Class Codes: B60R 16/03 for supply of electrical power to vehicle subsystems or for circuit arrangements for charging batteries H02J7/00
• CPC Class Codes: H02J 1/14 Balancing the load in a network
• CPC Class Codes: H02J 2310/46 for ICE-powered road vehicles

Abstract

An electric source noise pattern analysis method for vehicle battery protection and power management and device thereof provides ignition status recognized against battery discharge due to electric equipment requirement. This device is connected in parallel with the main battery and backup battery of a vehicle. This device features the addition of a source characteristic sensing unit which analyzes voltages, currents, power noises of main battery and backup battery, a pattern analysis method which utilizes the sensing characteristics to recognize the running and power used situation of vehicle, and a power management and control unit which employs at least one adjustment timer to manage main battery and backup battery relied on the vehicle situation. The device which operates to connect and disconnect the main and the backup battery from the load based on a sophisticated management algorithm to control to prevent from power exhausted by electric appliances.

Claims

1. A method for vehicle battery protection with battery power source noise pattern analysis comprising the steps of:

i) getting power source signal from positive and negative poles of a main battery and a backup battery of vehicles;

ii) measuring voltage of the main battery at a specific sampling time;

iii) measuring current of the backup battery at a specific sampling time;

iv) measuring voltage of the backup battery at a specific sampling time;

v) measuring voltage noise of a vehicle generator at a specific sampling time;

vi) enter a first power management pattern when detected voltage values of successive sampling signals of the main battery in a certain interval are higher than a third voltage;

vii) enter a second power management pattern when detected voltage values of successive sampling signals of the main battery in a certain interval are lower than a first voltage;

viii) enter a seventh power management pattern when detected current values of successive sampling signals in a certain interval are higher than a limited current, wherein, the successive sampling time in a certain interval ranging from 5 to 8, or equivalent with sampling time;

ix) when the detected battery voltage values of successive sampling signals in a certain interval are lower than the third voltage and higher than a second voltage, and the power source noise variation matches noise pattern that the generator charges the batteries, it is learned that the vehicle is turned on normally and the generator charges the main battery as well as the backup battery so that a third power management pattern is taken;

wherein the successive sampling times of the main battery in a certain interval ranging from 4 to 9, or equivalent with sampling time, and the successive sampling times of the noise in a certain interval ranging from 6 to 10, or equivalent with sampling time;

x) when the detected battery voltage values of successive sampling signals in a certain interval are lower than the second voltage and the voltage noise variation doesn'"'"'t match noise pattern that the generator charges the batteries, it is leaned that the engine is off and stops charging the batteries while other electric appliances still consume power, and a fourth power management pattern is taken;

wherein the successive sampling times of the main battery in a certain interval ranging from 4 to 9, or equivalent with sampling time, and the successive sampling times of the noise in a certain interval ranging from 6 to 10, or equivalent with sampling time;

xi) under the fourth power management pattern, when the preset timing of a variable timer is up, take the fifth power management pattern;

wherein the time of the variable timer is set from 0 minutes to the defined hours and the switches are turned on at predetermined interval;

xii) when the detected battery voltage values of successive sampling signals in a certain interval are lower than the first voltage and the power source noise variation doesn'"'"'t match noise pattern that the generator charges the batteries, it is leaned that the engine is off and stops charging the batteries while other electric appliances still consume power so that the main battery power is lowered to safe limit, and a sixth power management pattern is taken;

wherein the successive sampling times of the main battery in a certain interval ranging from 4 to 9, or equivalent with sampling time, and the successive sampling times of the noise in a certain interval ranging from 6 to 10, or equivalent with sampling time;

xiii) on the first power management pattern, cut off and stop charging the main battery as well as the backup battery, and display that the batteries are full charged;

xiv) on the second power management pattern, take alarming and display that the battery voltage is low;

xv) on the third power management pattern, connect and charge the main battery as well as the backup battery, and display charging status;

xvi) on the fourth power management pattern, display power exhaustion of the main battery, and supply power from the backup battery;

xvii) on the fifth power management pattern, cut off power supply from the main battery when the preset time is up, display power exhaustion of the main battery, and supply power from the backup battery;

xviii) on the sixth power management pattern, cutoff power supply from the backup battery, display power exhaustion of the main battery as well as the backup battery while the power is enough for restarting the vehicle;

xix) on the seventh power management pattern, cutoff power supply from the main battery as well as the backup battery, display/alarm abnormal status or short circuit of vehicle electric appliances and take measures for protection of the batteries and the vehicle.

2. The method as claimed in claim 1, further comprises

i) when the detected main battery voltage values of successive sampling signals in a certain interval are lower than the third voltage and higher than the second voltage, and the power source noise variation matches noise pattern that the generator charges the batteries, it is learned that the vehicle is turned on normally and the generator charges the main battery as well as the backup battery so that a third power management pattern is taken;

wherein the successive sampling times of the main battery in a certain interval ranging from 3 to 7, or equivalent with sampling time, and the successive sampling times of the noise in a certain interval ranging from 4 to 8, or equivalent with sampling time;

ii) when the detected main battery voltage values of successive sampling signals in a certain interval are lower than the second voltage, and the power source noise variation doesn'"'"'t match noise pattern that the generator charges the batteries, it is learned that the vehicle engine is turned off and the batteries stop charging while other electric appliances still consume power, then take the fourth power management pattern;

wherein the successive sampling times of the main battery in a certain interval ranging from 3 to 7, or equivalent with sampling time, and the successive sampling times of the noise in a certain interval ranging from 4 to 8, or equivalent with sampling time;

iii) under the fourth power management pattern, when the preset time of the variable timer is up, take the fifth power management pattern;

iv) when the detected main battery voltage values of successive sampling signals in a certain interval are lower than the first voltage, and the power source noise variation doesn'"'"'t match noise pattern that the generator charges the batteries, it is learned that the vehicle engine is turned off and the batteries stop charging while other electric appliances still consume power so that the main battery power is lowered to safe limit, then take the sixth power management pattern;

wherein the successive sampling times of the main battery in a certain interval ranging from 3 to 7, or equivalent with sampling time and the successive sampling times of the noise in a certain interval ranging from 4 to 8, or equivalent with sampling time;

v) on the first power management pattern, cut off the main battery as well as the backup battery, stop charging the batteries and display the batteries are full;

vi) on the second power management pattern, alarm and display low voltage of the batteries;

vii) on the third power management pattern, connect the main battery as well as the backup battery, and show that the batteries are in the charge;

viii) on the fourth power management pattern, cut off the main battery as well as the backup battery, stop charging the batteries and display that the power of main battery is exhausted and the power is from the backup battery;

ix) on the fifth power management pattern, cut off power supply from the main battery, and display that the power of the main battery is exhausted and the power is from the backup battery;

x) on the sixth power management pattern, cutoff power supply from the backup battery, and display that the power of the main battery as well as the backup battery is exhausted but still with enough for restarting the vehicle.

3. The method as claimed in claim 1, wherein on step ii) sampling time ranges from 400 ms to 550 ms, threshold;

on step iii) sampling time ranges from 450 ms to 600 ms, threshold;

step iv) sampling time ranges from 30 ms to 60 ms, threshold.

4. The method as claimed in claim 2, wherein on step i) sampling time ranges from 300 ms to 540 ms, threshold;

on step ii) sampling time ranges from 20 ms to 50 ms, threshold.

5. The method as claimed in claim 1, wherein from step v) to step x) the voltages and currents comply with relations, excluded the threshold,

0.75×

V_P≦

the first voltage V_L≦

0.95×

V_P

1.115×

V_P≦

the second voltage V_H≦

1.120×

V_P

1.27×

V_P≦

the third voltage V_U≦

1.32×

V_P

1.4×

A_P≦

limited current A_R≦

1.75×

A_P.

6. The method as claimed in claim 2, wherein from step iii) to step iiv), the voltages comply with relations, excluded the threshold:

0.70×

V_P≦

the first voltage V_L≦

0.90×

V_P

1.113×

V_P≦

the second voltage V_H≦

1.118V_P

1.26×

V_P≦

the third voltage V_U≦

1.30×

V_P.

7. The method as claimed in claim 1, wherein on step xii) checking of the noise pattern analysis is further simplified into the relation, excluded the threshold:

100 mV˜

2.4V≦

the voltage noise variation V_N≦

150 mV˜

4.8V.

8. The method as claimed in claim 2, wherein on step x) checking of the noise pattern analysis is further simplified into the relation, excluded the threshold:

100 mV˜

2.4V≦

the voltage noise variation V_N≦

150 mV˜

4.8V.

10. The device as claimed in claim 9, wherein the device further comprising the source characteristic receive and measure unit (33) with the battery power source noise pattern analysis method of claim 1.

11. The device as claimed in claim 9, wherein the device further comprising the source characteristic receive and measure unit (33) with the battery power source noise pattern analysis method of claim 2.

9. A device, a battery protector (3), for vehicle battery protection with battery power source noise pattern analysis, connected with a battery or a plurality of connected battery sets of vehicles with engines and generators in parallel, comprising a source characteristic sensing unit (32) for detecting source features of the battery sets;

a source characteristic receive and measure unit (33) for analyzing power features output by the battery sets; and

an actuator unit (34) for managing and controlling output and switching of the battery sets;

wherein

source characteristic sensing unit (32) having one or a plurality sets of sampling time circuit (321) that sets one or a plurality sets of sampling time for sampling, one or a plurality sets of voltage receive and measure circuit (322) that receives sampled voltage and converts the value of the voltage, one or a plurality sets of current receive and measure circuit (323) that receives sampled current and converts the value of the current, and one or a plurality sets of noise receive and measure circuit (324) for receiving sampled noise and converting the value of the noise;

source characteristic receive and measure unit (33) having a frequency analyzer (331) that compare and analyze the signals of voltage, current and noise for checking whether the vehicle generator is on or off and prevent interference from other electric appliances being used or not;

a pattern igniter (332) that receives results from the frequency analyzer (331) and outputs signals with various pattern characteristics;

a power management (333) that receives signals with various pattern characteristics, takes power management measure such as cut off, connect, or reverse the batteries and generate signals for management;

actuator unit (34) having a variable timer circuit (341) that sets different time from outside by combinations of switches and generates clocking signal, an output controller (342) that receives signals from the variable timer circuit (341) and checks signals from the power management (333) for output control signals of power cutoff or connection; and

one or a plurality sets of source cutoff and connection circuit (343) that receives control signals from the output controller (342) so as to cut off or connect power from one or a plurality of batteries.

12. The device as claimed in claim 9, wherein the device further comprising a power supplier protector (31) for protecting the device and the power supplier protector (31) having an over voltage protector (311) to isolate over voltage, a low voltage protector (312) protects batteries when battery voltage is too low, a polar protector (313) that isolates the battery power source for protecting vehicle electric appliances and battery sets when the polarity of the battery are connected in reverse direction, and a short protector (314) that generates isolation for protecting the device and batteries when short circuit of the outside device (4) happens.

13. The device as claimed in claim 12, wherein the polar protector (313) of the power supplier protector (31) automatically transfer the device into corresponding the positive and negative polarity when the polarity of the battery are connected in reverse direction;

and when the output end of the vehicle battery protection device (3) is short, cut off power source from batteries for protecting vehicle electric appliances and battery sets.

14. The device as claimed in claim 9, wherein the device further comprising an alarm/display unit (35) having a display (351) formed by one or a plurality sets of LED light for showing power management status that the device takes toward the power source of batteries, and an alarm (352) that is a buzzer generating sounds with various frequencies for warning the device taking power management measure to the power source of batteries.

15. The device as claimed in claim 14, wherein the display (351) of the alarm/display unit (35) uses LED lights to show different power management status.

16. The device as claimed in claim 14, wherein the display (351) of the alarm/display unit (35) is a liquid crystal display for showing different power management and battery status.

17. The device as claimed in claim 9, wherein the device further having a set or a plurality sets of noise receive and measure circuit (324) that compare signal from noise receiving end with the set reference signal, being amplified by an amplifier, and then the noise is converted into digital signals by a signal processor, so does the comparison ratio of the received noise to the reference signal;

thus the circuit of battery protection device in accordance with the present invention is simplified.